| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0KKV | 39 | 35.45 % | | 40 | 35.40 % | | 2 | C D C C | K0ND | 31 | 28.18 % | | 33 | 29.20 % | | 3 | C C D C C C | KC9OFJ | 15 | 13.64 % | | 15 | 13.27 % | | 4 | C C D C C | AD0JX | 14 | 12.73 % | | 14 | 12.39 % | | 5 | C C D C | AJ4A | 8 | 7.27 % | | 8 | 7.08 % | | 6 | C D C | K0N | 3 | 2.73 % | | 3 | 2.65 % | |
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